Australian Wagyu – the marbling is not as intense but still highly enjoyable. If you are the kind of person who likes to have a little chew in your meat, I think you would prefer this to the Japanese version.
Sukiya turns out to be quite good as with the soy sauce base that they are using and also the soup being boiled quite a while.
If you're looking for an indulgent all-you-can-eat meal, then Kuro Japanese Steamboat should be on your list.